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Commitments, Contingent Liabilities and Other Matters - Noncontrolling Interest in South African Subsidiary (Details) R in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2018 ZAR (R) | Jul. 06, 2016 ZAR (R)
Loss Contingencies [Line Items] |  |  |  |  |
Adjustment related to redeemable noncontrolling interest | $ 0.0 | $ 0.0 | $ 18.1 |  |
SPX Technologies | BEE Partner | South Africa |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Amount due from BEE Partner under promissory note | R |  |  |  |  | R 30.3
SPX Technologies | BEE Partner | Put Option | South Africa |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Amount entitled for Put Option exercise | R |  |  |  |  | R 287.3
Net redemption value | $ 17.7 | $ 20.9 |  | R 257.0 |
Amount reclassified from non-controlling interest to paid in capital |  |  | 38.7 |  |
Adjustment related to redeemable noncontrolling interest |  |  | $ 18.1 |  |
DBT Technologies | SPX Technologies | BEE Partner | Put Option | South Africa |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Noncontrolling interest percentage | 25.10% |  |  | 25.10% |

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